Accelerated Pavement Testing of Perpetual Pavement Test Sections under Heavy Aircraft Loading at FAA’s National Airport Pavement Test Facility

2019 ◽  
Vol 48 (1) ◽  
pp. 20180906 ◽  
Author(s):  
Navneet Garg ◽  
Qiang Li ◽  
David Brill
Keyword(s):  
Test Facility ◽  
Accelerated Pavement Testing ◽  
Airport Pavement ◽  
Perpetual Pavement ◽  
Pavement Testing

Effect of Pavement Structure on the Mechanical Response and Performance of Perpetual Pavements at the National Airport Pavement Test Facility

2018 ◽  
Vol 2672 (23) ◽  
pp. 31-39
Author(s):  
Carlos E. Cary ◽  
Zilong Wang ◽  
Hao Yin ◽  
Navneet Garg ◽  
Ryan Rutter
Keyword(s):  
Layer Thickness ◽  
Mechanical Response ◽  
Permanent Deformation ◽  
Surface Profile ◽  
Fatigue Cracking ◽  
Design Criterion ◽  
Test Facility ◽  
Test Items ◽  
Airport Pavement ◽  
Perpetual Pavement

Construction Cycle 7 (CC7) conducted at the FAA National Airport Pavement Test Facility (NAPTF) was aimed to study the effect of hot mix asphalt (HMA) layer thickness and develop perpetual pavement design criterion for airfield flexible pavements. Four fully instrumented perpetual test pavements were designed, constructed, and tested, with all test items trafficked under heavy aircraft loads using a three duals in tandem configuration. Pavement condition was monitored using heavy weight deflectometer tests, distress surveys, and surface profiles. Comprehensive response data analysis revealed that increasing HMA layer thickness significantly reduced the tensile strain at the bottom of the HMA layer, permanent deformation in the unbound layer, and vertical stress at top of the subgrade. Thicker HMA test items exhibited better rutting performance, as evidenced in both multiple depth deflectometer and surface profile data. The interaction between HMA layer temperature and thickness was captured in the pressure cell responses. More tests are planned to determine the threshold HMA strain to prevent fatigue cracking.

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